Mandrel for carpet rolling machines



Dec. 27, 1932. w HQFFMAN 1,891,984

MANDREL FOR CARPET ROLLING MACHINES Filed June 10, 1932 2 Sheets$heet lDec. 27, 1932. N. w. HOFFMAN MANDREL FOR CARPET ROLLING MACHINES 2Sheets-Sheet Filed June 10, 1952 Patented Dec. 27, 1932 UNITED STATESPATENT OFFICE NORMAN W. HOFFMAN, OF BLOOMSB'URG, PENNSYLVANIA, ASSIGNORTO THE M'AGEE CARPET CO., OF BLOOMSBUBG, PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA MANDREL FOR OAR-PET ROLLING MACHINES Application filed June10, 1932.

This invention relates to machines for forming narrow strip or wide webgoods, and particularly pile carpets, into tightly wound rolls.

The object of the invention is to provide a collapsible mandrel forweb-winding machines on which the goods is adapted to be wound and whichmay be readily removed from the completed roll.

Another object of the invention is to provide the mandrel with novelmechanism for tightly gripping the end of the strip over. a minimum areaof the goods adjacent the said end thereof and which isreadilyreleasable from the goods to permit the mandrel to be removed from thefinished roll.

The construction and operation of the mechanism forming the subject ofthe present invention will be fully disclosed hereinafter, referencebeing had to the accompanying drawings, of which:

Fig. 1 is a perspective view of the improved mandrel in operatingposition in a web-windin machine;

Fig. 2 is a face view of the mandrel shown in Fig. 1;

Figs. 3 and 4 are respectively right and left end views of the mandrelas viewed in Figs. 1 and 2;

Figs. 5 and 6 are transverse sectional elevations taken on the line 5-5,Fig. 2, and respectively showing the combined gripping androll-collapsing means in inoperative and operative positions Fig. 7diagrammatically illustrates the mandrel in cooperative relation to theother elements of the winding machine.

The mandrel 1 comprises a body section 2 in the form of a hollowcylinder, a segmental section of which is eliminated to form an opening3 extending the full length of the mandrel.

The hollow body cylinder 2 is provided at one end with an integralsegmental head 4 from which projects a square trunnion 5 in axialalignment with the cylinder 2.

At its opposite end the cylinder 2 is provided with a readily removablefull circular head 6 to which the cylinder 2 is secured by tap bolts 7.Extending from the head 6 in Serial No. 616,559.

axial alignment with the cylinder 2 and trunnlon 5 is a circulartrunnion 8.

Plvotally mounted in the heads 4 and 6 respectively are trunnions 9, 9of an elongated segmental element 10 which are disposed in eccentricrelation to the axis of the main body cylinder 2.

The element 10 is provided with a segmental eccentric cam surface 11which when the element 10 is in the inoperative position shown in Fig. 5provides a slot 12 between its longitudinal corner edge 13 and alongitudinal corner edge 14 ofthe body 2 at one side of the opening 3 inthe mandrel 1, for the reception of one end of a strip of goods as to bewound in a roll on the mandrel 1.

When the element 10 is swung about the axes of its trunnions 9, 9 fromthe position shown in Fig. 5 to that shown in Fig. 6 the end of thestrip as is firmly gripped between the eccentric cam surface 11 of theelement 10 and the gripping edge 14 of the cylinder body element 2.

lVhen the element 10 is in the position shown in Fig. 6 the eccentriccam surface 11 thereof substantially fills and practically closes theopening 3 in the mandrel and forms a spirally tangent continuation ofthe outer bearing surface 15 of the cylinder body 2 of the mandrel onwhich the goods is wound, due to the eccentricity of the surface 11relative to the axes of the trunnions 9 of the element l0 and theeccentricity of the trunnions 9 with respect to the axes of thetrunnions 5 and 6 of the mandrel 1.

The combined cylinder closing and gripping element 10 is adapted to berocked within the hollow body 2 by a lever 16 se cured to or in the hub17 of the element 10 adjacent the full circular head 6 of the mandrel 1,said operating lever 16 being adapted to engage a stop pin 18 projectinginwardly from said head to maintain the element 10 in correct positionfor its corner.

aligned short shafts 20 and 21 respectivelymposed in said opening insubstantially tangent mounted inbearings 22 and 23 secured to or formedin side frames 24 and 25 of a machine which also supports a rough facedretarding roll 27, a pressure and measuring roll 28, guide rolls 29, 30and 31 and a lint-removing rotating brush 32.

The short shaft 20 is provided withan axially aligned squared openingfor the reception of the squared trunnion 5 of the mandrel 1, and theshort shaft 21 is provided with a head 33 having an axially alignedcircular opening for the reception of the round trunnion 8 of themandrel 1. I

The short shaft is adapted to be rotated from any suitable readily.controllable source of power through a train of gears including a spurgear 34: secured tothe outer end of the short shaft 20. V

The short shaft 21 acts as a support for the opposite end of the mandrel1 and is readily movable in an axial direction for releasing the head 33from the mandrel trunnion 8, by means of a lever 35 operativelyronnectedto the short shaft 21, whereby the mandrel with the roll ofgoods thereonmaybe readily: removed from the machine.

By throwing the lever 16, and consequently ,the combined fillingand'gripping element v 10, from the operative position shown in Fig. 6to the inoperative position shown in Fig. 5

the end of the strip 8 is released and the effective bearing surfacebetween the mandrel i1 and the innermost lapof the goods isvreduced tosuch an Xtent that the mandrel is relatively loose in the roll of goodsand may be readily withdrawn therefrom, the inner end of the strip iswhich lies within the hol- .low cylinder 2 of the mandrel movinglongitudinally along the slot 12 and through an opener 36 formed betweenthe edge 37 of the segmental head 4 of the mandrel and the adjacentinner surface 38 of the cylind'ical body 2, which is aligned with theslot 12 formed between the gripping surface 11 of the element 10 and theedge 14 of the cylindrical body 2. r 1

From the above, it will bev quite obvious 4 that with the arrangement ofelements 2 and 10 arranged as described there isprovided a readilycollapsible mandrel "and readily operable gripping means for the goodswhich due to the eccentricity of the gripping and opening fillingsurface 11 of the element 10 5 permits a reduction in the effectivebearing surface of the mandrel which will permit the mandrel to bereadily removed from the completed roll of goods.

I claim: r 1. A collapsible mandrel comprising a cylindrical body memberhaving a longitudinal segmental opening in the periphery thereof,and amember mounted for circular movement in and relative to said body memberand provided with a curved surface normally dis- "relation to theperiphery of the cylindrical body member.

2. A collapsible mandrel comprising a cylindrical body member having alongitudinal segmental opening in the periphery thereof, and a membermounted for circular movement in and relative to said body member andprovided with a curved surface normally disposed in said opening insubstantially tangent relation to the periphery of the cylindrical bodymember adjacent one side of the opening and spaced inwardly from saidperiphery at the opposite side of the opening and gripping thematerialtobe wound on the mandrel between said curved surface and theadjacent edge of the opening in the body member.

3. A collapsible mandrel comprising a cylindrical body member having alongitudinal segmental opening in the per1phery thereof, a"

member mounted for circular movement in and relative to said body memberand pro vided with a curved surface normally disposed in said opening insubstantially tangent relation to the periphery of the cylindrical bodymember adj acent one side of the openin and spacedinwardly from saidperiphery at the opposite side of the opening and gripping the materialto be wound on the mandrel between said curved surface and the adjacentedge of the opening in the body member, and a head at one end of thecylindrical body member having an opening in line with the openingbetween the said curved surface of the one member and the adjacentgripping edge of the opening in the other member to permit withdrawal ofthe gripped portion of the material from the mandrel as the mandrel iswithdrawn from the material wound thereon.

e. A collapsible mandrel comprising a hollow cylindrical body memberhaving a longitudinal segmental opening therein,a head at each end ofsaid body member, a member pivotally mounted in said heads and providedwith an eccentrically curved surface movable to a position in saidopening with one edge in tangent relation tothe peripheral surface ofthe body member adjacent one side of the opening providing maximumeffective winding surface on the mandrel andmovable to a position withinsaid cylindrical body member reducing'said winding surface to minimum.

5. A collapsiblemandrel comprising a hollow cylindrical body memberhaving a longitudinal segmental opening therein, a head at" each end ofsaid body member, a member pivotally mounted in said heads in eccentricrelation to the axis of the body memberand provided with a curvedsurface eccentric to the axes of said members respectively and movableto a position in said opening with.

' one edge in tangent relation to. the peripheral surface of the bodymember adjacent one side reenter of the opening providing maximumeffective winding surface on the mandrel and movable to a positionwithin said cylindrical body member reducing said winding surface to aminimum.

6. A collapsible mandrel comprising a hollow cylindrical body memberhaving a long tudinal segmental opening therein, a head at each end ofsaid body member, a member pivotally mounted in said heads and providedwith an eccentrically curved surface movable to a position in saidopening with one edge in tangent relation to the peripheral surface ofthe body member adjacent one side of the opening and in inwardly spacedrelation to said peripheral surface adjacent the opposite side of saidopening to press the material to be wound on the mandrel into grippingcontact with the edge of the body member at the last said side of theopening and providing maximum eficctive winding surface 011 the mandrel.

7. A collapsible mandrel comprising a hollow cylindrical body memberhaving a 1011-- gitudinal segmental opening therein, a head at each endof said boc y member, a member pivotally mounted in said heads andprovided with an eccentrically curved surface movable to a position insaid opening with one edge in tangent relation to the peripheral surfaceof the body member adjacent one side of the opening and in inwardlyspaced relation to said peripheral surface adjacent the opposite side ofsaid opening to press the material to be wound on the mandrel intogripping contact with the edge of the body member at the last said sideof the opening and providing maximum efiective winding surface on themandrel, and means for swinging said eccentrically surfaced member to aposition within the body member wherein the said tangent edge of saidcurved surface lies adjacent to and spaced from the said grip ping edgeof the body member, to release the material and to reduce the windingsurface of the mandrel to a minimum to permit withdrawal of the mandrelfrom the roll of material thereon.

8. A collapsible mandrel comprising a hollow cylindrical body memberhaving a longitudinal segmental opening therein, a head at each end ofsaid body member, a member pivotally mounted in said heads and provided.with an eccentrically curved surface movable to a position in saidopening with one edge in tangent relation to the peripheral surface ofthe body member adjacent one side of the opening and in inwardly spacedrelation to said peripheral surface adjacent the opposite side of saidopening to press the material to be wound on the mandrel into grippingcontact with the edge of the body member at the last said side of theopening and providing maximum efiectivewinding surface on the mandrel,and means for swinging said ec centrically surfaced member to a positionwithin'the body member wherein the said tangent edge of said curvedsurface lies adj acent to and spaced from the said gripping edge of thebody member, to release the material and toreduce the winding surface ofthe-mandrel to a minimum to permit Withdrawal of the mandrel fromtheroll of material thereon, one of said heads having an opening in linewith the opening provided between the said spaced edges of the body andgripping members to permit thefpre viously gripped portion of thematerial to move out of the mandrel during withdrawal oft'he mandrelfrom the roll of material.

' 9. A collapsible mandrel comprising a hollow cylindrical body memberhaving a lon gitudinal segmental opening therein, ahead at each endofs'aid body member, amember pivotally mounted in said heads andprovided with eccentricaliy curved surface movable to a position in saidopening with one edge in tangent relation to the peripheral surface ofthe bodymember adjacent one side of the opening and in inwardly spacedrelation to said peripheral surface acent the opposite side of saidopening to press the material to be wound on the mandrel into grippingcontact with the edge of the body member at the last said side of theopening and providing maximum effective winding surface on the mandrel,and a lever connected to said eccentrically surfaced member andprojecting beyond the said peripheral surface of said body member adjacent one of said heads for swinging said eccentrically surfaced memberto a position within the body member wherein the said tangent edgeofsaid curved surface lies adjacent to and spaced from the said grippingedge of the body member, to release the material and to reduce thewinding surface of the mandrel to a minimum to permit withdrawal of themandrel from the roll of material thereon, the other of said headshaving an opening in line with the opening provided between the saidspaced edges of the body and ripping members to permit the previouslygripped portion of the material to move out of the mandrel duringwithdrawal of the mandrel from the roll of material.

10. A collapsible mandrel comprising a hollow cylindrical body memberhaving a longitudinal segmental opening therein, a head at each end ofsaid body member, a member pivotally mounted in said heads and providedwith an eccentrically curved surface movable to a position in saidopening with one edge in tangent relation to the peripheral surface ofthe body member adjacent one side of the opening and in inwardly spacedrelation to said peripheral surface adjacent the opposite side of saidopening to press the material to be wound on the mandrel into grippingcontact with the edge of the body member at the last said side of theopening and providing maximum effective winding surface on the mandrel,a lever connected to said eccentrically surfaced member and projectingbeyond the said peripheral surface of said body member ad acent one ofsaid heads for swinging said eccentrically surfaced member to a positionwithin the body member wherein the said tangent edge of said curvedsurface lies adjacent to and spaced from the said gripping edge of thebody memher, to release the material and to reduce the winding surfaceof the mandrel to a minimum to permit withdrawal of the mandrel from theroll of material thereon, the other of said heads having an opening inline with the opening provided between the said spaced 7 edges of thebody and gripping members to permit the previouslygripped portion of thematerial to move out of the mandrel during withdrawal of the mandrelfrom the roll of material, and means for limiting the said swingingmovement of said eccentrically surfaced member relative to the bodymember to maintain the said open relation between the said edges of saidmembers for receiving the material to be gripped and wound by and on themandrel.

NORMAN W. HOFFMAN.

